Finding the Fourth Proportional to 1,123,812.59, 1,685,438.25 and 440,838.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,812.59 : 1,685,438.25 = 440,838.23 : x
2. Step 2: Convert to fraction form
   1,123,812.59/1,685,438.25 = 440,838.23/x
3. Step 3: Cross multiply
   1,123,812.59x = 1,685,438.25 × 440,838.23
4. Step 4: Simplify right side
   1,123,812.59x = 743,005,619,117.89
5. Step 5: Solve for x
   x = 743,005,619,117.89/1,123,812.59
6. Step 6: Final answer
   x = 661,147.27